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(No ModeL) 2 Sheets-Sheet 1.

Patented June 9, 1885. Fig.1.

Inventor;

u PETERS. mwuumnpw. Wuhinglon. n. c,

(No Model.) 2 Sheets-Sheet 2. J. WEGrlVIAN, Jr. MI-DDLINGS PURIFIER BRUSH.

No. 319,763. Patented June 9, 1885.

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N. PETERS. FhMwI-ilhugnphar, Withingtni'i. 1).;

-' U ITED STATES "PATENT Enron.

JOHN wEGMAn, JR, on iaoorinsrnn, new YQR'K.

TM] Duties-P L} R IFIE R USHQ SP'ECIPICATION'forming part of Letters Patent No. 319,763, dated June 9, 1885.

j Application filed July 5,1884 (No model.) i

To all may concern: Referring to the parts, Ais the frame of Be it known that I, JOHN WEGMAN, Jr., of

Rochester, in the county. of Monroe and State of New York, have invented anew and useful Improvement in MiddlingsPurifier Brushes, which improvement is fully set forth in the following specification and accompanying draw- 1n s. I

a is well understood in flour-milling that the screen of the shoe holding the middlings has to be constantly brushedor kept clear of the particles of the middlings adhering to it, so as to furnish free passage for the purified middlings through the same.

The object of my invention is to produce a cylindrical rotating brush or brush-cylinder that shall traverse backward and forward from end to end along the screen and brush the latter in both directions, and which more perfectly clears the screen than do the brushes heretofore used and the invention consists in parts and devices constructed and operating as hereinafter fully described, and more particularly pointed out in the claims...

Referring to the drawings, Figure 1, Sheet 1, is a side elevation of an'ordinary middlingspurifier with my improved parts attached in place, parts being broken away to uncover interior parts of the device. Fig. 2 shows a transverse vertical section of the same, taken upon the dotted line a; in Fig. 1, viewed as indicated by arrow 2, showing more clearly the rotating brush with parts of the device omitted; Fig. 3, a horizontal sectional view or plan of a portion of the same, showing more clearly the rotating brush and the manner of driving the same and of shifting its direction of motion at each end of the screen; Fig. 4, Sheet 2, a transverse section of the frame, taken on the dotted line a," in Fig. 3,and viewed as indicated by the arrow y in Fig. 3, showing more fully the manner of operating the belt-shifting mechanism of the machine; and

Fig. 5, alongitudinal section of parts of the machine, taken on the dotted line Fig. 3, further assisting to show the manner in which the carriage at either end of its run shifts the belts to reverse the direction of its motion, said Figs. 4 and 5 being drawn to a larger scale than that to which the first three figures are drawn.

the purifier; B, the ordinary vibrating shoe for holding the unpurified. middlings, being of common form and placed within the body of the purifier'in the usual manner. a

a is the silk screen of the shoe in common use, through which the purified middlings fall. l

bis the brush for brushing or clearing the under surface of the screen, the same in my. invention being in substantially cylindrical form corresponding inlength to the width of said screen. This brush device consists of parallel slats 0,provided with bristles or other suitablematerial to form brushes for the screen. The. brush is mounted in a carriage,

d, resting transversely beneath the shoe upon horizontal longitudinal slats f,attachedto the inner sides of the frame. The brush b is pro vided with an axial shaft, 6, which has its bearingsin the end pieces of the carriaged, and is provided, at one end with a toothed wheel, i, the teeth of which mesh in spaces 11 'of a horizontal rack, g, attachedto the rest or slat f, holding one end. of the carriage, as shown. Now, it will be understood from this description of parts that if the carriage be by any means moved longitudinally along its ways or supports f the brush will be caused to rotate upon its axis on account of the toothwheel engaging with the rack, as stated.

it is a chain having its ends attached to the respective sides of the carriage (I about midway in the length of the latter, said chain passing over sprocket-wheels k 70, held respectively at the two ends of the purifier-frame. The sprocket 7c is secured to a horizontal shaft, 12, resting in journal-boxes m m, as shown. The shaft n overhangs the frame of the purifier at one end, which overhanging end is pro vided with a nest of pulleys, Z, the two outer pulleys being fitted to turn loosely upon the shaft, while the intermediate pulley is secured rigidly thereto. Two belts, 0 0, one straight and the other crossed, rest upon these pulleys, leading from a driving-pul ley (not shown) located at the opposite end of the purifier-frame. These belts operate like the shifting-belts of a metal-planer, the shaft a rotating in one direction or the other, according as the straight or crossed belt.

occupies the middle or fixed pulley of the nest. From the chain being, attached to the carriage, as stated, itwill be. seen that, by rotating the shaft n alternately in one direction or the other, the carriage will be caused to.

move backward and forward under the screen, the brush being rotated upon its axis, asbefore stated, during the advance movement of the carriage in either direction. The shoe and the ways or track of the brush-carriageare relatively so placed that the brush comes in contact whichisthe screen is kept unclog ge d with and sweeps the screen as it advances.

The belts are shifted uponthe pulleys-by, means of a shifter, p, operated bya bent lever or bell-crank, t, the free upward-'turned'end u of which latter being in positionto been-'1' countered by the carriage as it"zllgpproaches the end of the screen, as shown in 1 gs; M 141 5. A rod, 1-, connected with thelever t, lying longitudinally beneath the carriageandreach; ing to the opposite endofpthe frame of the; purifier, has an upward projectiom'dsimilar to the part u of the beIl crank L, inpositionto j be encountered by the carriage as it approaches the opposite end of 'thescreen, by

means of which the shifter pis movedlbyth'e carriage while at the farther en'd of the screen to shift the. belts, reversing the motionof the shaft n, and causing the carriage to return, j

Thus this rotating brush is causedautomatic j ally to move from end to end'ofI-the screen, having its direction oft-rotation-reversed as'itsdirection of advance is changed, an'dfb'riusliing] the surface of the screen in both directions 'Ias it moves along under the same." By means of 7 this rotating-brush, and the fact that itsf mo tions, both of advance and' rotation, arerec'ipg rocated, the screen is much more perfectly sweptor cleared of the adhering particles than is the case with the old method, the result of 1 times and a much greater quantity of the purified middlings pass through the same within a given time. The brush-cylinder shown is thenumber of brush-bars may be increased or decreased if found convenient in practice. I prefer to usea rack (not shown) similar to the one shown at g at theother end of the cart, wi th its projection u, and 'be'lt-sh'ifter p, for reoipipcating'themotionof the carriage, and means, substantiallyas showriand-described, for driving thefcarriage.

: reciprocating shaft, sprocket-wheel, and confl e n ee et'd f i l j i r i h, oos d fast pulleys and beltstoturn them, and means,

1belts-and' alternately changing the direction'of ere :Qf Wi hes, q meapurmse p c QH W GMAH, J R.

Witnesses:

E. B. 'WHITMO provided with six parallel brush-bars, 0; but

riage, and provide the brush-cylinder thereat 5o rack and brusl'r'b, with its toothed 6o brush-carriage d, ways ff, and thebell-crank 3. Inicomb'ination with the screen of a mid 7o ,dlings -purifier anda clearing-brush therefor, a

:siibstantially as described, for shifting the 

